Clutch mechanism.



A. KNISTROM. CLUTCH MECHANISM.

APPLICATION FILED DEC. I7, I910.

' Patented May-16, 1 9181 ssus SHEE-T1. 19:1

m v Er I u m m i A; KNIS TROM.

CLUTCH MECHANISM.

' Q APPLICATION FILED DECI17I 1910.

5 SHEETSSHEET 2 1,9 INVENTOR BY i? 7 mmfiw? Patented May16, 1916.

A. KNlSTROM.

CLUTGH MECHANISM.

APPLICATION- FILED DEC. 17. 1910.

Patented May 16, 1916.

- 5 SHEETSSHEET 3.

AW W- 20 WW A. KNlSTROM. CLUTCH MECHANISM.

APPLICATIQN FILED DECJT, 1910: V

Patented May18,1916.

5 SHEETSSHEET 4 A. KNISTHOM.

CLUTCH MECHANISM.

APPLICATION FILED 050.17, 1910.

1 ,1 83,384, Patented May 16, 1916.

5 SHEETS-SHEET 5.

STATES PATENT OF ICE.

AUGUST KNISTROM, OF BINGHAMTON, NEW YORK.

CLUTCH MECHANISM.

Kms'rnori,

. manually operated. The adding'machine itself comprises mechanism in which the items or amounts are set up by the actuation of finger 'keys, while the Zperation of printing the items, effecting th desired addition or subtraction, and printing the total-.or result' are performed by the machine. As a result the printing and calculating operations can be efiected with the greatest possible rapidity, so rapidly, in fact, that the capacity of the machine shall be practically limited only by the skill of the opera-,.

' tor in settin up the items.

Another ject is to provide an apparatus in which the power of the motor shall be appliedinstantly upon the'mere release or actuation of a controlling button or equivalent device by the operator and shall be automatically cut ff eth conclusion of each cycle of operation.

In carrying out my invention in the preferred manner, I provide a motor, preferably electric, which is arranged to run continuously while the machine is in use. Between the motor shaft and power shaft of the machine I provide the clutch, with means controlled by the operator for throw ing the same into action at will. Theclutch also includes mechanism whereby it is automatically thrown out of action. practically instantaneously at the end of the cycle of operations for which the motor furnishes the power. Thus the only act to be performed by the operator besides setting up the items is to throw the clutch into action,

effected in the preferred embodiment by a slight pressure on a bar or arm conveniently located. The printing, adding, or other operation is then instantly done by the machine, driven by the motor, by the time the operator has noted the next item which isto he set up, so that no delay Whatever is occasioned by the mechanical operations.

Specification of Letters Patent.

and useful Improvements in' Patented May 16,1 916. Application filed December 17, 1910. Serial No. 597,740.

The embodiment thus briefly outlined is"-v illustrated in the annexed drawings, in

which- Rigure 1 shows the specific connection between the clutch shaft and the power shaft. Also showsthe tripping mechanism for the clutch. Fig. 2 is an end view of the clutch mechanism removed from itscasing. Fig. l

: is a cross sectional View. of the clutch casmg and mechan1sm. Fig. 4 is .a view simi-' lar to Fig. 3, showmg the clutch rim and driven shaft sectioned. Fig. 5 is a section on line VIIVII ofFig. 3 looking in the direction of the arrows and shows the parts in normal'position. Fig. 6 shows the driven shaftijremoved from the casing. Fig. 7

shows; another end view of the clutch casing mechanism, the parts being in normal posltion. "Flg. 8 shows another end view of the clutch mechanism, which is broken away in part to show the construc t1on of parts, Fig. 9 is a View on line XI XI of Fig. 3 looking in the/direction of the arrows; Fig. 10 shows the clutch cylinder removed from the clutch casing.-

' Referring to the drawings, the numeral 4 designates a motor to which the clutch 5 is connected. The motor is suspended from a suitable frame (not shown) and when it is desired to throw the clutch into action the operator depresses a suitable bar, or plunger (not shown) arranged ne'ar the, item or set up keys. The clutch mechanisni is normally held in inoperative posIifion by means of a stop or hook 7 .(see ig. 2). T s Stop is fixedly secured to a shaft which is mounted in the clutch casing. The outer end of thisshaft is provided with a crank arm 24. andthe latter is suitably connected to the clutch controlling key not shown, so that depression of the latter by 'the pressure of'the operators finger or hand 11 an arm 38 is connected. The arm 38 is provided with a pin and slot connection a rotatable connection with the driven shaft 11 which is arranged at ri ht-anglesto the Within the disk" 18 there is provided ii hol low cylinder 19' loosely iitti'ngthc disk 18' (see Fig. 10). Projecting from theshaft 11 into the interior of the ring 20 are the prongs 11*, three in number, constituting a.

armature shaft 15; so that he motor can be continuously driven, and with it the worm gear and its carrying disk, without impart ing motion to the clutchshaft until the latter is connected with the disk by the clutch elements now to be described.

The clutch casing 13 has a cylindrical interior 21 in which the clutch mechanism is housed. Projecting centrally from such interior are openings 22, 23 which serve as bearings for the driven shaft 11 and the driving shaftll. The disk 18 is fixed upon the shaft 11 by means of a pin 24.

so that thd latter may rotate without rotating the cylinder. Within the hollow cylinder 19 is a clutch ring 20 clearly shown in Fig. 10, and having a smooth outer surface. This clutch ring 20 is preferably made of tool steel, 'and the cylinder 19 is made of machinery steel so that the former can be forced into the latter inorder to prevent any relative movementof these twoclemcnts. The ring 20 has an irregular inner surface comprising shallow pockets 27 which are adjac'en[ the gradual inclines 34 part of shaft 11, with intervening spaces 11, as clearly shown in Fig. 6. The interiorthereof is hollowedput to receive the shaft'll. Shaft 11 is also provided with 'a socket 25* in which the shaftlll is adapted to enter thereby allowing said shaft 11 to exte d entirely through said cylindrical 'spac the socket being in fact "only an extension of the hollow portion between theprongs above referred to. Located J'between the prongs andiclutch' ring andinov able therewith are clutch elements 26, the latternormally'restinginthe shallow pockets 27, of the clutch ringinwhich position they have no binding action. Pivotednt 28 (see Fig. 6) onthe driven shaft 11 is a two-arm lever 29 one of the arms of which enters a socket or space 30 in the cylindrical ring 19 and the other arm 35 Fig. 5 of which is adapted to be engaged by "the stop Lever 7. W'hen the arm is held iii-the normal position, by the stop 7, which posiicense tion is shown in Figs. 7 and 9, the resilient means '31 and 32 fastened at one of their ends to the hollow cylinder 19 and at the other to the driven shaft will tend'to rotate these two members in opposite directions.

So when the stop is caused to release the arm 29 the shaft 11 with its prongs: are

caused by the springs 31 and 32 to rotate it 1 7 being observed that the movement of hollow cylinder 19 and clutchring 20 are locked againstjhe tension of the springs.

by means of a stop 33 conveniently located on the cylinder 19. This causes the clutch elements to ride up the gradual incline 34' (see Fig. 10) of the, clutch ring 20 and cause a bindingnction betweensziid ring and the shaft ll fit being remembered that this shaft is" continuously driven from the motor 4 and that the clutch ring 20 and the cylindrical ring 19 rotate as a unit. f After releasing the clutch controlling key '(not shown) to which the stop 7 is connected it immedmtely assumes the position shown,

projectiongilii on the, arm wlienYthe same ,makes a complete revblution. This is due to spring actuated or other mechanism not fully shown. Just before making the comfor exampleyin Fig. 5, ready to catch the I plete revolution the incline 36 of the locking arm 36 rides upon-the stop 33 thereby cylinder 19, the part 37 finallv droppinglm hind the stop 33 to prevent flutter-ingot the clutch mechanism so frequently heard in devices of this kind, this dropping, as well as the brake action of the lock 36,.being caused by the resilient means 36 being attached to one end thereof and the other end V of said resilient means being attached to the interior of the clutch casing.

Briefly the operation of my improved clutch is as'follows: The latch 7 is released from arm 35 of lever 29. This permitsthe lever 29 to rock and allows a. relative rotati'on between the driven shaft 11 and hollow cylinder 19, and clutch ring 20. The clutch elements 26 are carried from l lo pockets 27.iiitocontact with the inclines "34: of the clutch} ring 20 and are thereby crowded into engagement with driving shaft 11. Thereafter,

'the driving shaft 11 and driven "shaft 11' rotate in unisonior'a com leto revolution 3 until the latch 7 intercepts t earm on lever 29 and imimrts a relative movement between the driven shaft 11 and the'clutch ring 20. .This relative movement carries the clutch elements 26 back into pockets 27. in the rin 20 and discngages them from driving she 11" whereby the. driving and driven shafts a are declutched.

The spring abutment cooperates with the stop 36 to overcome the momentum of parts 19 and 20 and also prevents chattering of thel clutch parts.

It is to be understood of 95 overcoming the momentum of the hollow forms without comprising a clutch ring interposed between v the disk and clutch elements for efiecting a frictional engagement between the clutch elements and the driving shaft.

2. A clutch comprising combination clutch elements, a driven shaft having means there'- on to coiiperate with said elements, a driving shaft extending through the clutch elements, clutch means surrounding said clutch elements and means for effecting. a movement of the clutch elements and clutch means relative to each other whereby the clutch elements clutch the driving shaft and the driven shaft together.

3. A clutch comprising a driving shaft provided with a disk and a driven shaft provided with means for carrying clutch elements, said means telescoping into said disk,

clutch ring means interposed between said disk and the aforesaid means adapted to cause the clutch elements on the driven shaft to frictionaltliy engage the driving shaft, and means for e ecting a relative movement be tween said clutchin means and the driven shaft to cause said 0 utching elements on the driven shaft to engage the driving shaft.

4. A clutch comprising a drivmg'shaft I provided with an annular disk and a driven shaft provided with means which telescopes moved inwardly into fri Y to carry clutch elements, ing said clutch elements radially inward into said annular disk andwhich is adapted to carry one or more ring loosel interposed between the annular disk and t e aforesaid means and adapted to ,contact with said clutch elements, and

' provided with inclined surfaces corre ondmg in number to the number of clutc elements, and-means for ltausirig a relative movement between the clu ch ring and the driven shaft whereby the 5:1 tch elements are #tiohal contact with aid driving shaft. k 5; A clutch comprising a driving shaft provided with anannular disk anda driven shaft provided with means which telescope into said annular disk and. which is adapted with respect to and in contact with the drivinlgfshaft toclutch the latter with the driven sat. f

4.6. A 'clutch "comprising a driving shaft provided with a' disk or annular flange and a driven shaft f provided with -means for carrying clutch elements which telescopes clutch member interposed between the annu-- lar flange .and theafores'ai'dmeans, said member having means thereon to cam the clutch elements, and. means for effecting a relative movement between the annular clutch member and the aforesaid means for causing the clutch elements to frictionally en a e the driving shaft whereby motion' wi l imparted to the driven shaft;

clutch elements, -'a clutch and means formovinto sald disk or annular flange, an annular Intesti'mony whereof I afii'x my signature I in the presence of two subscribing witnesses, A

AUGUST KNISTBOM. n

Witnesses: L. F. .Gmmn,

M. M. BOLAND. 

